[#BloombergLP-bsls-AtomicOperations-swapUint64]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bsls.adoc[bsls]::xref:BloombergLP/bsls/AtomicOperations.adoc[AtomicOperations]::swapUint64
:relfileprefix: ../../../
:mrdocs:

Atomically swap `atomicUint` with sequential consistency.

== Synopsis

Declared in `<bsls_atomicoperations.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
static
xref:BloombergLP/bsls/Types/Uint64.adoc[Types::Uint64]
swapUint64(
    xref:BloombergLP/bsls/Atomic_TypeTraits-0b/Uint64.adoc[AtomicTypes::Uint64]* atomicUint,
    xref:BloombergLP/bsls/Types/Uint64.adoc[Types::Uint64] swapValue);
----

== Description

Atomically set the value of the specified `atomicUint` to the specified `swapValue` and return its previous value, providing the sequential consistency memory ordering guarantee.

== Return Value

previous value of `atomicUint`

== Parameters

[cols="1,4"]
|===
| Name| Description
| *atomicUint*
| atomic unsigned 64‐bit integer to modify
| *swapValue*
| value to store
|===


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